| A | B |
|---|
| organ | a group of tissues that work together to do a job |
| tissue | groups of cells of the same kind that work together to do a job |
| cell | the basic living unit of an organism |
| organism | a living thing made up of one cell or more |
| organ system | groups of organs that work together to do a job |
| mitochondrion | an organelle that produces and releases energy for the cell |
| cytoplasm | jelly-like fluid that fills the cell |
| vacuole | a storage sac in the cell that is usually filled with fluid |
| chloroplast | the green organelle that traps sunlight to produce sugar in plant cells |
| nucleus | the cell part that controld the activities of the other organelles; the control center |
| cell membrane | a thin, living cell covering; it allows materials to enter and exit the cell |
| cell wall | a thik covering of a plant cell made of nonliving fiber; gives the cell shape and protection |
| eukaryote | a cell that contains a true nucleus; all organells have a membrane |
| prokaryote | cell with no true nucleus; no membrane separtes the structures in the cytoplasm |
| organelle | structures found in the sytoplasm that do the work of the cell |
| integumentary | system which covers and protects the body |
| cardiovascular | system which transports oxygen and nutrients all over the body |
| skeletal | system which holds the body up and protects internal organs |
| muscular | system which allows your body to move |
| nervous | system which sends electrical messages all over the body |
| digestive | system which provides energy for the body by breaking down the food that we eat |
